package main

import "fmt"

func main() {
	a := 1
	//无限循环
	for{
		a++
		if a > 3{
			break
		}
		fmt.Println(a)
	}

	for a<=5{
		a++
		fmt.Println(a)
	}

	for i := 0;i<3 ;i++  {
		fmt.Println(i)
	}
}